Lawn-trimmer.



A. L; CHAMPION.

LAWN TRIMMER.

APPLICATION FILED 11111112, 1910. 4

Patented Ma1121, 1911.

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L'AWN TRIMMER.

APPLIOATION FILED JUNE 2, 1910. I

Patented Mar. 21, 1911.

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ABRAHAM L. CHAMPION, OF LOS ANGELES, CALIFORNIA.

LAWN-TRIMMER.

To all whom it may concern:

Be it known that LABRAHAM L. CHAMPION, a citizen of the United States,residing at Los Angeles, in the county of Los Angeles and State ofCalifornia, have invented certain new and useful Improvements in Lawn-Trimmers; and I do declare the following to be a full, clear, and eXactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to improvements in lawn trimmers and has for itsobject to provide a machine of this character which will be simple,compact, and durable in construction, and which will possess manyadvantages over similar devices in present use.

With this and other objects in view, the invention consists of certainnovel features of construction, combination and arrangement of parts aswill be more fully described and particularly pointed out in theappended claim.

In the accompanying drawings :--Figure 1 is a side elevation of a lawntrimmer embodying my improvements; Fig. 2 is a plan view partly brokenaway; Fig. 3 is a vertical section taken on the line 33 of Fig.

2; Fig. 4 is a side elevation with the base plate removed; Fig. 5 is adetail transverse sect-ion through the bearing for the rotary cutter;Fig. 6 is a detail section on the line 66 of Fig. 3; Fig. 7 is a detailvertical section on the line 77 of Fig. 4c; and Fig. 8 is a detailsection on the line 88 of Fig. 2.

In the accompanying drawings, which are for illustrative purposes onlyand therefore not drawn to a scale, the numerals 1 and 2 designatethe'opposite side members of the machine which are preferably cast orotherwise suitably formed of the desired shape. Suitable handles foroperating the machine may be secured to the side members, one of saidhandles being shown in the drawings. One of the side members, as 1, isprovided in its outer face with a main recess 3, in which the drive gear4 is mounted, and the smaller communicating recess 5, in which arearranged the gear wheels 6 and 7 The drive gear 4 is arranged upon theinner squared end 8 of the drive shaft 8 which at its opposite end ispreferably cylindrical, as indicated at 9, to allow the drive wheel 10to freely revolve thereon. The inner face of the hub 11 of the drivegear is preferably provided with ratchet teeth 12 and suitablySpecification of Letters Patent.

Application fi1ed June 2, 1910.

Patented Mar. 21., 1911.

Serial No. 564,562.

mounted in the hub portion of the drive wheel is a spring-pressed pawl 1L extending through the aperture 15 in said hub and adapted to normallyengage the ratchet teeth 12 of the drive gear to thereby lock the drivewheel 10 and drive gear 4 to rotate together in a forward direction, butto automatically uncouple the two driving members when the drive wheel10 is rotated in the reverse direction. The outer end of the drive shaftis preferably reduced, as at 8", and suitable securing means, as the key8, is inserted through said reduced end. The drive gear 4 intermesheswith the gear wheel 6 which in turn meshes with the gear wheel 7,whereby motion is imparted to the knife operating shaft 16 on the end ofwhich the gear '7 is fixed. The shaft 16 extends through and isrevolubly mounted in the horizontal tubular bearing 17 which ispreferably cast upon the inner face of the side member 1. The other endof the shaft 16 is provided with a squared portion, as 18, to receiveone of the knife carrying disks 19, which are preferably mounted torotate around the bearing 17, annular flanges 20 having ballreceivinggrooves 21 in their outer faces being suitably securedupon said bearing.The knife carrying disks 19 are provided with annular bearing shoulders22 which cooperate with the flanges 20 to provide ball races for thebearing balls 23, whereby friction between the bearing flanges 20 andthe knife carrying disks is elimi nated. The cutting blades 24 arearranged between the disks 19 in the usual manner.

From the foregoing, it will be seen that as the drive wheel 10 isrotated, power is communicated through the intermediate mechanism to thegear 7 whereby the cutting knives 24 are rotated to out the grass orsimilar growth against the horizontally disposed stationary cuttingknife or blade 25 which is pivotally mounted directly in rear of therotary cutting knives and is held in its adjusted position by theadjusting screws 26, which are threaded through the bearings 27 on theside member 1 and engage against the extension 28 of said knife.

A bearing roller 29 designed to run upon the grass is mounted in theadjustable bearings 30 arranged for vertical adjustment in grooves 31 inthe inner faces of the exten sions 32 of the side members of themachine.

An adjustable cutting blade 33 having a sharp cutting edge is pivotallymounted upon the outer face of the side member 2 and is adjustable toproject to any desired plane, preferably extending a short distancebelow the periphery of the drive wheel 10. Any suitable adjusting means,as the slot 34: and screw 35, may be provided for adjusting the cuttingblade 83. This cutting blade is for the purpose of trimming the edges oflawns and to sever crab grass which runs close to the ground surface andescapes the cutting blades 24.

From the foregoing description taken in connection with the accompanyingdrawings, the construction and operation of the invention will bereadily understood without requiring a more extended explanation.

Various changes in the .form, proportion and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages of this invention as defined in theappended claim.

Having thus described my invention, what I claim is:

The lawn trimmer herein described and shown comprising rigidly connectedmembers, one of said members having a circular recess in its outer sidein its upper portion and a smaller elongated recess below andcommunicating with said circular recess, a bearing sleeve formedintegral with and projecting laterally from the inner side of saidmember and having spaced annular flanges, an axle journaled in said sidemember at the center of the circular recess and projecting laterallythrough and outwardly beyond said recess, a drive wheel mounted looselyon the outer end of said axle, a drive gear fixed on the axle Within thecircular recess, means to operatively connect the drive wheel and thedrive gear, a forward pinion mounted in the smaller recess and meshingwith the drive gear, a shaft extending through the bearing sleeve andhaving the outer end projecting through. the rear end of said recess, apinion rigid with said end of said shaft and meshing with the. forwardpinion, a knife carrying disk secured to the opposite end of said shaftand having an annular shoulder overlying and running on the adjacentflange of the bearingsleeve, a second knife carrying disk mountedloosely on the bearing sleeve and having an annular shoulder overlyingand running on the adjacent flange of said sleeve, and knives secured toand extending between said disks.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

ABRAHAM L. CHAMPION. lVitnesses Josnrrr WV. PINKNEY, LITTLETON MoDUrr.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

